Features: Useful Glasses: Our glasses can effectively block mobile phone, computer, LED blue lights which will cause sore, swollen, itchy eyes, dry eyes, easy fatigue, decreased vision, and eye damage. Premium Quality: The glasses are made of metal material, the lens has an easy-to-clean film and an anti-blue light coating, which can effectively protect against UV rays and harmful blue-violet light. The reinforced and hard reflective layer can effectively convert harmful blue light into beneficial light. Multiple Functions: Sm-changing lenses can change color according to the intensity of sunlight. The stronger the sunlight, the deeper the color changes, and it moves with the light. Outdoors with a sunglasses effect. Variety of colorful colors to choose from. Get Better Sleep:These bluelight block glasses lenses have been upgraded with anti-glare technology to prevent common dry eye disease/eye congestion/blurred vision and Relief of headaches, reduce eye strain during Daytime, They also can help protect our natural production of melatonin that should be being released at night to help us fall asleep. Comfortable Frame: Pleasant lines create a beautiful frame appearance, and ergonomic construction provides wonderful wearing feeling and all-day comfort. Specification: Material:Metal Glasses Width: 139 mm Glasses Length: 131 mm Glasses Height: 46 mm Single Lens Width: 51 mm Nose Bridge: 18 mm Weight:23.4g Notice: 1. Due to different monitors aning effects, the actual color may be slightly different from the image. 2. Due to manual measurement, please allow 1-3mm deviation. Include: 1*Glasses